Wiring 37 115C

Posted by mypackard On 2012/1/23 15:31:08

I ahve a 1937 115C that I am trying to unscramble the lighting circuit on. The wiring diagram shows a city, passing and driving circuits. Of these which is the high beam circuit and what do they mean by each circuit as far as brightness goes? The wiring diagram also shows a notation by the dimmer switch "Left light for passing" what exactly does this mean and how does the dimmer switch work? The head light switch also seems the have multiple positions. What are they?
As a footnote I ahve found the NAPA fan belt 25-24449 works better then the listed one.